<?php

/**
  +----------------------------------------------------------
 * 字符串截取，支持中文和其他编码
  +----------------------------------------------------------
 * @static
 * @access public
  +----------------------------------------------------------
 * @param string $str 需要转换的字符串
 * @param string $start 开始位置
 * @param string $length 截取长度
 * @param string $charset 编码格式
 * @param string $suffix 截断显示字符
  +----------------------------------------------------------
 * @return string
  +----------------------------------------------------------
 */
function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true) {
    if (function_exists("mb_substr"))
        return mb_substr($str, $start, $length, $charset);
    elseif (function_exists('iconv_substr')) {
        return iconv_substr($str, $start, $length, $charset);
    }
    $re['utf-8'] = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/";
    $re['gb2312'] = "/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/";
    $re['gbk'] = "/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/";
    $re['big5'] = "/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/";
    preg_match_all($re[$charset], $str, $match);
    $slice = join("", array_slice($match[0], $start, $length));
    if ($suffix)
        return $slice . "…";
    return $slice;
}

/**
 *  获取淘宝等级图片
 * @param type $le 
 */
function getLevel($le) {
    $url = 'http://pics.taobaocdn.com/newrank/';
    if ($le <= 5) {
        echo $url . 's_red_' . ($le) . '.gif';
    } elseif ($le <= 10) {
        if ($le == 10) {
            echo $url . 's_blue_' . 5 . '.gif';
        } else {
            echo $url . 's_blue_' . (($le) % 5) . '.gif';
        }
    } elseif ($le <= 15) {
        if ($le == 15) {
            echo $url . 's_cap_' . 5 . '.gif';
        } else {
            echo $url . 's_cap_' . (($le) % 5) . '.gif';
        }
    } else {
        echo $url . 's_crown_' . (($le) % 5) . '.gif';
    }
}

function getDateV($date) {
    $y = substr($date, 0, 4);
    $m = substr($date, 4, 2);
    $d = substr($date, 6, 2);
    return $y . '年' . $m . '月' . $d.'日';
}

?>
